In case you haven't read what Hollis said on Reddit about the performance here is a quick summary. She went to the final dress rehearsal and was shaken and crying and never felt worse as a human being. "After our first dress rehearsal in the costumes with the crew, publicists, performers etc watching us, I walked out of the Barclay Center shaking and crying."
She also said that she had never been in something where she was someone to be stared at or gawked at like an animal in a zoo or a side show act.
I agree that this was the purpose behind Miley's inclusion of little people in her performance. Here is where Hollis and I don't see the same side of the story. Hollis walked out of dress rehearsals and felt awful but she still came back for the show. If it was so awful for her then why did she go back? If she felt so strongly that she was a piece of meat then why did she go back? No one forced her to go. It isn't like she was going to keep working for Miley after the performance. She says that she was asked to go on tour and declined so then why go out there for the show? Did she take the paycheck for the rehearsal and the show? Yes. Did she keep it? yes. If she felt so strongly about it why she did keep it? It is all well and good to come out and talk about how you felt demeaned and if she had gone through the dress rehearsal and not gone back I would totally be on her side but she did go back. Also we are taking her word for it that she was asked and declined to go on tour. Maybe she wasn't asked and this is how she got back at Miley.